Hello.
1) Check that you don't have empty cells on the pages. Add empty Tex objects to them.

2) Temporarily disable your antivirus, firewall and any other protection.
3) Restart your computer and don't run any other programs.
4) Remove and install the latest stable version of the program. You can download it in your personal account.
5) Uninstall .NET Framework.

Hi Gerrit, 

thank you for getting in touch. 

If I understand correctly, you performed an updated to the current beta version and since then you can no longer start the program, is this correct? What Windows version do you have?

Thanks! Kind regards.